Tereitoey



(No Model.)

J. A. GOWAN.

STAMP GUIDE.

No. 391,527. Patented Oct. 23, 1888.

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JOHN A. GCNVAN, OF BUTTE CITY, MONTANA TERRITORY.

STAMP-GUIDE.

SPECIFICATIOIT forming part of Letters Patent No. 391,527, dated October23, 1888.

Application filed April 18, 1858. Serial No. 271,086. (No model.)

To all whom it may concern.-

Be it known that I, JOHN A. GOWAN, of Butte City, Silver Bow county,Montana Territory, have invented an Improvement in Stamp-Guides; and Ihereby declare the following to be a clear, full, and exact descriptionof the same.

My invention relates to a guide for the stamp-stem of crushing-batteriesand a clamp by which the same is held and adjusted with reference to thestampstem and the guiderail, all of which will be more fully describedby reference to the accompanying drawings, in which- Figure 1 is aperspective view showing the wooden bushing and the clamp surroundingit. Fig. 2 is a side view showing the wooden bushing, the stamp-stemwhich passes vertically through it, the clamps, and right and left handscrew, also the guiderail and crosshead bolts. Fig. 3 is a View of oneend of the cast-iron chair which fits the guide-rail and the guide.

Ais the wooden bushing or guide of the bat- V tery stamp-stem. Theseguides are usually made of hard wood in two halves, in each of which isa semicircular groove or channel, so that when the two are securedtogether the stamp-stem is inclosed between them, and is thus guided inits vertical movements. These guides are usually secured together and toa guide-rail by bolts with nuts, and the constant jar and shaking of thestamp-stem makes it difficult to keep them tight, in addition to whichall the bolts and nuts must be removed if it is necessary to remove thestamp for repairs or other purpose.

My invention is designed to provide an easy, quick, and reliable meansfor securing the two halves together, adjusting them for wear andattaching them to the guide-rail, so that they may be easily removedwhen desired. For this purpose the two halves A,which form the guide,are made tapering toward the top and toward the bottom, as shown inFigs. 1 and 2, and at each end is fitted a clamp, B,which incloses thefront and two sides. The inner face of this iron clamp is beveled tocorrespond with the bevel of the guide, so that it may move easily overthe surface of the same when desired. Each of these clamps has lugs orarms 0, projecting outward from the center portion, and theseprojections have slots made in the outer ends, as shown in Figs. 1 and2.

1) are nuts having projecting lugs or trunnions F upon opposite sides,which fit into the slots above mentioned, and by this means the nuts canreadily be removed from the clamps at any time when desired.

G is a right and left hand screw, the screwthreads at the opposite endsof which fit the respective nuts I) of the two clamps at the top andbottom of the bushing. U The central part of this screw may have a holemade through it,with a pin or rod which serves as a lever to turn thescrew, or it may be made polygonal so as to be turned by a wrench or byany other suitable or desirable means, and it will be manifestthat whenturned in one direction the right and left hand screws at the oppositeends,enteriug the nuts D, will draw the clamps toward each other, andthus draw the two halves of the bushing together with any desired powerand close them upon the vertically-moving stamp-stem. The rear or innerends of the clamps are turned so as to form hooks H, and these hooksengagewith the T- heads I of the bolts J which pass through theguide-rail, and are secured by nuts upon the back of the rail.

K is an iron plate or chair, which has flanges L at each end and sides.The rear flanges of this chair project, so as to clasp the upper andlower sides of the guide-rail, while the front flanges may embrace theupper and lower ends of the guide A, which is thus prevented from movingup or down. The T-heads. I of the bolts J project, so as to lie ingrooves or channels M, formed in the sides of the chair, so that whenthe bolts are screwed up the chair will be held firmly upon theguide-rail, while the hooks of the clamp, above described, will engagethe outer ends of these T-head bolts, so as to hold the clamps and withthem the guide-bushing firmly in the chair.

It will be seenthat by a simple turn of the right and left hand screw Gthe clamps will be drawn toward each other upon the inclined faces ofthe bushing, and will thus draw the bushing together, and also hold itfirmly in its place in the chair.

If it is necessary to remove the stampstem for any purpose, the rightand left hand screw is turned so as to run out of the clamp-nuts, andthe clamps are then turned up and down against the stamp stem, whichallows the hooks H at their inner ends to disengage from the T-shapedbolts, thus leaving the bushing perfectly free to be taken out.

Having thus described my invention,what I claim as new, and desire tosecure by Letters Patent, is

1. The two-part stamp guide or bushing made tapering toward the upperand lower ends, in combination with the clamps fitting these taperingends, and the right and left hand screw by which the clamps are drawntoward each other to hold and adjust the bushing, substantially asherein described.

2. The two-part tapering bushing recessed to form a guide-hole throughwhich the stampstem moves, the clamps fitting the upper and lower end ofsaid bushing and having the slotted lugs projecting from the outerfaces, in combination with nuts, with the projecting lugs or trunnionsfitting said slots, and the right and left hand screw the ends of whichfit into said nuts, so as to draw the clamps toward each other,substantially as herein described.

3. The two part stamp-guide made tapering toward the upper and lowerends, the clamps fitting said tapering ends, the right and left handscrew, and the nuts into which the 0pposite ends of the right and lefthand screw are fitted to turn, in combination with the T- headedguide-rail bolts, and the hooks formed at the inner ends of the clampsto engage the heads of said bolts, substantially as herein described.

4. The guide bushing, the iron plate or chair having the projectingflanges at the upper and lower ends which engage, respectively,

the upper and lower edges of the guide-rail and the upper and lower endsof the guidebushing,in combination with the T-head bolts, and nuts bywhich the chair is held upon the guide-rail, and the clamps inclosingthe two part bushing and having hooks at their inner ends which engagethe outer ends of the T- head bolts, substantially as herein described.

In witness whereof I have hereunto set my hand.

JOHN A. GOWAN.

Witnesses:

J OHN F. Forms, DAVID STERRITT.

